﻿<%@ webhandler Language="C#" class="Upload" %>


//KindEditor ASP.NET


using System;
using System.Collections;
using System.Web;
using System.IO;
using System.Globalization;
using LitJson;

public class Upload : IHttpHandler
{
    private HttpContext context;
    ////int i = 0;
    public void ProcessRequest(HttpContext context)
    {
        //String aspxUrl = context.Request.Path.Substring(0, context.Request.Path.LastIndexOf("/") + 1);
        String aspxUrl = HttpContext.Current.Request.ApplicationPath;
        string Custom_directory;


        if (context.Request.QueryString["Custom_directory"] != null)
        {
            Custom_directory = context.Request.QueryString["Custom_directory"] == "选择分类" ? "选择分类" : context.Request.QueryString["Custom_directory"].ToString();
        }
        else {  Custom_directory = "选择分类"; }

        //文件保存目录路径
        String savePath = "/Upload/";

        //文件保存目录URL
        String saveUrl = aspxUrl + "Upload/";

        //定义允许上传的文件扩展名
        Hashtable extTable = new Hashtable();
        extTable.Add("image", "gif,jpg,jpeg,png,bmp");
        extTable.Add("flash", "swf,flv");
        extTable.Add("media", "swf,flv,mp3,wav,wma,wmv,mid,avi,mpg,asf,rm,rmvb");
        extTable.Add("file", "doc,docx,xls,xlsx,ppt,htm,html,txt,zip,rar,gz,bz2");

        //最大文件大小
        int maxSize = 1000000;
        this.context = context;

        HttpPostedFile imgFile = context.Request.Files["imgFile"];
        if (imgFile == null)
        {
            showError("请选择文件。");
        }

        String dirPath = context.Server.MapPath(savePath);
        //String dirPath = saveUrl;
        if (!Directory.Exists(dirPath))
        {
            showError("上传目录不存在。");
        }

        String dirName = context.Request.QueryString["dir"];
        if (String.IsNullOrEmpty(dirName)) {
            dirName = "image";
        }
        if (!extTable.ContainsKey(dirName)) {
            showError("目录名不正确。");
        }

        String fileName = imgFile.FileName;
        String fileExt = Path.GetExtension(fileName).ToLower();

        if (imgFile.InputStream == null || imgFile.InputStream.Length > maxSize)
        {
            showError("上传文件大小超过限制。");
        }

        if (String.IsNullOrEmpty(fileExt) || Array.IndexOf(((String)extTable[dirName]).Split(','), fileExt.Substring(1).ToLower()) == -1)
        {
            showError("上传文件扩展名是不允许的扩展名。\n只允许" + ((String)extTable[dirName]) + "格式。");
        }

        //创建文件夹
        dirPath += dirName + "/";
        saveUrl += dirName + "/";
        if (!Directory.Exists(dirPath)) {
            Directory.CreateDirectory(dirPath);
        }
        if (Custom_directory=="选择分类") {
            //创建根据日期文件夹
            String ymd = DateTime.Now.ToString("yyyyMMdd", DateTimeFormatInfo.InvariantInfo);
            //dirPath += ymd + "/";
            //saveUrl += ymd + "/";
            dirPath += "未分类" + "/" + ymd + "/";
            saveUrl += "未分类" + "/" + ymd + "/";
        } else {
            //创建根据分类文件夹
            String ymd =Custom_directory;
            dirPath += Custom_directory + "/";
            saveUrl += Custom_directory + "/"; }

        if (!Directory.Exists(dirPath)) {
            Directory.CreateDirectory(dirPath);
        }

        String newFileName = DateTime.Now.ToString("yyyyMMddHHmmss_ffff", DateTimeFormatInfo.InvariantInfo) + fileExt;
        String filePath = dirPath + newFileName;

        imgFile.SaveAs(filePath);
        String fileUrl = saveUrl + newFileName;



        Hashtable hash = new Hashtable();
        hash["error"] = 0;
        hash["url"] = fileUrl;
        context.Response.AddHeader("Content-Type", "text/html; charset=UTF-8");
        context.Response.Write(JsonMapper.ToJson(hash));
        context.Response.End();
    }

    private void showError(string message)
    {
        Hashtable hash = new Hashtable();
        hash["error"] = 1;
        hash["message"] = message;
        context.Response.AddHeader("Content-Type", "text/html; charset=UTF-8");
        context.Response.Write(JsonMapper.ToJson(hash));
        context.Response.End();
    }

    public bool IsReusable
    {
        get
        {
            return true;
        }
    }
}
